./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fgets_multiply_52_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fgets_multiply_52_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2d26319dc8ca473618b013abe735255f59d6514fb3c3118bb57512acd3d6a6fb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 21:44:15,083 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 21:44:15,173 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Default.epf [2024-11-13 21:44:15,181 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 21:44:15,182 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2024-11-13 21:44:15,220 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 21:44:15,221 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 21:44:15,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-13 21:44:15,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 21:44:15,222 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 21:44:15,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 21:44:15,222 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 21:44:15,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 21:44:15,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 21:44:15,222 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 21:44:15,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 21:44:15,223 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 21:44:15,223 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 21:44:15,223 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 21:44:15,223 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 21:44:15,223 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 21:44:15,223 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 21:44:15,223 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-13 21:44:15,224 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-13 21:44:15,224 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-13 21:44:15,224 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 21:44:15,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 21:44:15,224 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 21:44:15,224 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 21:44:15,224 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 21:44:15,224 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2024-11-13 21:44:15,225 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 21:44:15,225 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d26319dc8ca473618b013abe735255f59d6514fb3c3118bb57512acd3d6a6fb [2024-11-13 21:44:15,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 21:44:15,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 21:44:15,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 21:44:15,635 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 21:44:15,638 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 21:44:15,640 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fgets_multiply_52_bad.i Unable to find full path for "g++" [2024-11-13 21:44:17,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 21:44:18,262 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 21:44:18,266 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fgets_multiply_52_bad.i [2024-11-13 21:44:18,296 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/data/768522503/cf47c41c65114c0eaa66c76ef4e42b71/FLAG15b8f9f68 [2024-11-13 21:44:18,313 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/data/768522503/cf47c41c65114c0eaa66c76ef4e42b71 [2024-11-13 21:44:18,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 21:44:18,317 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 21:44:18,319 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 21:44:18,319 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 21:44:18,324 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 21:44:18,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 09:44:18" (1/1) ... [2024-11-13 21:44:18,326 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f41c98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:18, skipping insertion in model container [2024-11-13 21:44:18,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 09:44:18" (1/1) ... [2024-11-13 21:44:18,385 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 21:44:19,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 21:44:19,848 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 21:44:19,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 21:44:20,153 INFO L204 MainTranslator]: Completed translation [2024-11-13 21:44:20,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20 WrapperNode [2024-11-13 21:44:20,153 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 21:44:20,155 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 21:44:20,155 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 21:44:20,155 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 21:44:20,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,185 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,209 INFO L138 Inliner]: procedures = 500, calls = 29, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 69 [2024-11-13 21:44:20,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 21:44:20,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 21:44:20,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 21:44:20,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 21:44:20,221 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,224 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,224 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,233 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,235 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,239 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 21:44:20,240 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 21:44:20,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 21:44:20,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 21:44:20,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 21:44:20,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/z3 [2024-11-13 21:44:20,295 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-13 21:44:20,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-13 21:44:20,329 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-13 21:44:20,330 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-13 21:44:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 21:44:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 21:44:20,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 21:44:20,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-13 21:44:20,535 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 21:44:20,537 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 21:44:20,732 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-11-13 21:44:20,732 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 21:44:20,802 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 21:44:20,803 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-13 21:44:20,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:44:20 BoogieIcfgContainer [2024-11-13 21:44:20,803 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 21:44:20,804 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-13 21:44:20,805 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-13 21:44:20,818 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-13 21:44:20,818 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:44:20" (1/1) ... [2024-11-13 21:44:20,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 21:44:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 21:44:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 18 states and 21 transitions. [2024-11-13 21:44:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-13 21:44:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 21:44:20,912 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 21:44:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 21:44:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 21:44:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 21:44:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 21:44:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 17 states and 20 transitions. [2024-11-13 21:44:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-13 21:44:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 21:44:21,350 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 21:44:21,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 21:44:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:44:21,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 21:44:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:44:21,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:44:21,550 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 21:44:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:44:21,608 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-13 21:44:21,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 13.11 09:44:21 ImpRootNode [2024-11-13 21:44:21,652 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-13 21:44:21,652 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 21:44:21,653 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 21:44:21,653 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 21:44:21,654 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:44:20" (3/4) ... [2024-11-13 21:44:21,657 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 21:44:21,658 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 21:44:21,659 INFO L158 Benchmark]: Toolchain (without parser) took 3341.87ms. Allocated memory is still 109.1MB. Free memory was 79.9MB in the beginning and 65.0MB in the end (delta: 14.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 21:44:21,662 INFO L158 Benchmark]: CDTParser took 1.76ms. Allocated memory is still 83.9MB. Free memory is still 40.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:44:21,663 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1834.92ms. Allocated memory is still 109.1MB. Free memory was 79.9MB in the beginning and 64.0MB in the end (delta: 15.8MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB. [2024-11-13 21:44:21,663 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.42ms. Allocated memory is still 109.1MB. Free memory was 63.4MB in the beginning and 61.1MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 21:44:21,664 INFO L158 Benchmark]: Boogie Preprocessor took 28.32ms. Allocated memory is still 109.1MB. Free memory was 61.1MB in the beginning and 59.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:44:21,664 INFO L158 Benchmark]: RCFGBuilder took 563.51ms. Allocated memory is still 109.1MB. Free memory was 59.9MB in the beginning and 46.1MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-13 21:44:21,664 INFO L158 Benchmark]: CodeCheck took 847.51ms. Allocated memory is still 109.1MB. Free memory was 46.1MB in the beginning and 65.0MB in the end (delta: -18.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:44:21,665 INFO L158 Benchmark]: Witness Printer took 6.08ms. Allocated memory is still 109.1MB. Free memory was 65.0MB in the beginning and 65.0MB in the end (delta: 7.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:44:21,670 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 2 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 13 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - UnprovableResult [Line: 1583]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1557, overapproximation of large string literal at line 1569, overapproximation of fgets at line 1555. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1569] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(line)={3:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1569] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1570] CALL CWE190_Integer_Overflow__int_fgets_multiply_52_bad() [L1551] int data; [L1552] data = 0 [L1554] char inputBuffer[(3 * sizeof(data) + 2)] = ""; VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=0, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1555] COND TRUE fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1557] data = atoi(inputBuffer) [L1564] CALL CWE190_Integer_Overflow__int_fgets_multiply_52b_badSink(data) [L1577] CALL CWE190_Integer_Overflow__int_fgets_multiply_52c_badSink(data) [L1581] COND TRUE data > 0 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=1073741824, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1583] data * 2 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.76ms. Allocated memory is still 83.9MB. Free memory is still 40.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1834.92ms. Allocated memory is still 109.1MB. Free memory was 79.9MB in the beginning and 64.0MB in the end (delta: 15.8MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.42ms. Allocated memory is still 109.1MB. Free memory was 63.4MB in the beginning and 61.1MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.32ms. Allocated memory is still 109.1MB. Free memory was 61.1MB in the beginning and 59.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 563.51ms. Allocated memory is still 109.1MB. Free memory was 59.9MB in the beginning and 46.1MB in the end (delta: 13.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * CodeCheck took 847.51ms. Allocated memory is still 109.1MB. Free memory was 46.1MB in the beginning and 65.0MB in the end (delta: -18.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.08ms. Allocated memory is still 109.1MB. Free memory was 65.0MB in the beginning and 65.0MB in the end (delta: 7.9kB). There was no memory consumed. Max. memory is 16.1GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 21:44:21,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fgets_multiply_52_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2d26319dc8ca473618b013abe735255f59d6514fb3c3118bb57512acd3d6a6fb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 21:44:24,673 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 21:44:24,827 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf [2024-11-13 21:44:24,861 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 21:44:24,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 21:44:24,862 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-13 21:44:24,863 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 21:44:24,863 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 21:44:24,863 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 21:44:24,863 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 21:44:24,863 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 21:44:24,864 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 21:44:24,864 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 21:44:24,864 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 21:44:24,864 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 21:44:24,864 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-13 21:44:24,864 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 21:44:24,865 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-13 21:44:24,865 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-13 21:44:24,865 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 21:44:24,865 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 21:44:24,865 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 21:44:24,865 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-13 21:44:24,866 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-13 21:44:24,866 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-13 21:44:24,866 INFO L153 SettingsManager]: * Command for calling external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 21:44:24,866 INFO L153 SettingsManager]: * Choose which separate solver to use for tracechecks=External_ModelsAndUnsatCoreMode [2024-11-13 21:44:24,866 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 21:44:24,866 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 21:44:24,867 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 21:44:24,867 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 21:44:24,867 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 21:44:24,867 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-13 21:44:24,867 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-13 21:44:24,867 INFO L153 SettingsManager]: * Use separate solver for trace checks=false [2024-11-13 21:44:24,868 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d26319dc8ca473618b013abe735255f59d6514fb3c3118bb57512acd3d6a6fb [2024-11-13 21:44:25,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 21:44:25,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 21:44:25,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 21:44:25,291 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 21:44:25,291 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 21:44:25,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fgets_multiply_52_bad.i Unable to find full path for "g++" [2024-11-13 21:44:27,427 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 21:44:27,855 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 21:44:27,856 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fgets_multiply_52_bad.i [2024-11-13 21:44:27,894 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/data/572638a15/accd34d596d54fb18688bcc0340f8662/FLAG093556747 [2024-11-13 21:44:27,918 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/data/572638a15/accd34d596d54fb18688bcc0340f8662 [2024-11-13 21:44:27,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 21:44:27,923 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 21:44:27,924 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 21:44:27,924 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 21:44:27,928 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 21:44:27,929 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 09:44:27" (1/1) ... [2024-11-13 21:44:27,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3efebbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:27, skipping insertion in model container [2024-11-13 21:44:27,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 09:44:27" (1/1) ... [2024-11-13 21:44:27,982 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 21:44:28,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 21:44:28,976 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 21:44:29,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 21:44:29,349 INFO L204 MainTranslator]: Completed translation [2024-11-13 21:44:29,350 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29 WrapperNode [2024-11-13 21:44:29,350 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 21:44:29,351 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 21:44:29,352 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 21:44:29,352 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 21:44:29,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,401 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,436 INFO L138 Inliner]: procedures = 505, calls = 29, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 68 [2024-11-13 21:44:29,438 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 21:44:29,439 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 21:44:29,440 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 21:44:29,440 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 21:44:29,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,465 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,477 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,483 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,491 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,497 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 21:44:29,502 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 21:44:29,502 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 21:44:29,502 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 21:44:29,503 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 09:44:29" (1/1) ... [2024-11-13 21:44:29,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-13 21:44:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/z3 [2024-11-13 21:44:29,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-13 21:44:29,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-13 21:44:29,637 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-13 21:44:29,637 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-13 21:44:29,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-13 21:44:29,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 21:44:29,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 21:44:29,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 21:44:29,857 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 21:44:29,859 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 21:44:30,030 INFO L? ?]: Removed 25 outVars from TransFormulas that were not future-live. [2024-11-13 21:44:30,030 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 21:44:30,087 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 21:44:30,087 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-13 21:44:30,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:44:30 BoogieIcfgContainer [2024-11-13 21:44:30,088 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 21:44:30,093 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-13 21:44:30,093 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-13 21:44:30,106 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-13 21:44:30,106 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:44:30" (1/1) ... [2024-11-13 21:44:30,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 21:44:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 21:44:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 18 states and 21 transitions. [2024-11-13 21:44:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-11-13 21:44:30,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-13 21:44:30,190 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 21:44:30,191 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 21:44:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/cvc4 [2024-11-13 21:44:30,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 21:44:30,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-13 21:44:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 21:44:30,421 ERROR L567 CodeCheckObserver]: First Tracecheck threw exception Proofs are not supported [2024-11-13 21:44:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 21:44:30,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 21:44:30,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 21:44:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 21:44:30,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-13 21:44:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-13 21:44:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 17 states and 20 transitions. [2024-11-13 21:44:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-11-13 21:44:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-13 21:44:30,595 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-13 21:44:30,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-13 21:44:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/cvc4 [2024-11-13 21:44:30,598 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-13 21:44:30,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-13 21:44:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:44:30,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 21:44:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:44:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:44:30,984 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-13 21:44:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-13 21:44:31,041 ERROR L418 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (3)] Exception during sending of exit command (exit): Broken pipe [2024-11-13 21:44:31,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-13 21:44:31,043 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-13 21:44:31,079 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 13.11 09:44:31 ImpRootNode [2024-11-13 21:44:31,080 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-13 21:44:31,081 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-13 21:44:31,081 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-13 21:44:31,083 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-13 21:44:31,084 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 09:44:30" (3/4) ... [2024-11-13 21:44:31,087 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-13 21:44:31,088 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-13 21:44:31,089 INFO L158 Benchmark]: Toolchain (without parser) took 3166.25ms. Allocated memory is still 83.9MB. Free memory was 56.0MB in the beginning and 44.3MB in the end (delta: 11.7MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. [2024-11-13 21:44:31,092 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 83.9MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:44:31,092 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1427.03ms. Allocated memory is still 83.9MB. Free memory was 56.0MB in the beginning and 49.3MB in the end (delta: 6.6MB). Peak memory consumption was 58.8MB. Max. memory is 16.1GB. [2024-11-13 21:44:31,093 INFO L158 Benchmark]: Boogie Procedure Inliner took 87.12ms. Allocated memory is still 83.9MB. Free memory was 49.3MB in the beginning and 46.5MB in the end (delta: 2.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:44:31,093 INFO L158 Benchmark]: Boogie Preprocessor took 62.14ms. Allocated memory is still 83.9MB. Free memory was 46.5MB in the beginning and 44.9MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-13 21:44:31,093 INFO L158 Benchmark]: RCFGBuilder took 586.06ms. Allocated memory is still 83.9MB. Free memory was 44.9MB in the beginning and 52.2MB in the end (delta: -7.3MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. [2024-11-13 21:44:31,094 INFO L158 Benchmark]: CodeCheck took 987.31ms. Allocated memory is still 83.9MB. Free memory was 52.2MB in the beginning and 44.8MB in the end (delta: 7.4MB). Peak memory consumption was 1.3MB. Max. memory is 16.1GB. [2024-11-13 21:44:31,094 INFO L158 Benchmark]: Witness Printer took 6.99ms. Allocated memory is still 83.9MB. Free memory was 44.8MB in the beginning and 44.3MB in the end (delta: 445.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-13 21:44:31,099 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 2 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 13 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - UnprovableResult [Line: 1583]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of atoi at line 1557, overapproximation of large string literal at line 1569, overapproximation of fgets at line 1555. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1569] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(line)={3:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1569] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1570] CALL CWE190_Integer_Overflow__int_fgets_multiply_52_bad() [L1551] int data; [L1552] data = 0 [L1554] char inputBuffer[(3 * sizeof(data) + 2)] = ""; VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=0, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1555] COND TRUE fgets(inputBuffer, (3 * sizeof(data) + 2), stdin) != ((void *)0) [L1557] data = atoi(inputBuffer) [L1564] CALL CWE190_Integer_Overflow__int_fgets_multiply_52b_badSink(data) [L1577] CALL CWE190_Integer_Overflow__int_fgets_multiply_52c_badSink(data) [L1581] COND TRUE data > 0 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=1073741825, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1583] data * 2 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48ms. Allocated memory is still 83.9MB. Free memory is still 64.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1427.03ms. Allocated memory is still 83.9MB. Free memory was 56.0MB in the beginning and 49.3MB in the end (delta: 6.6MB). Peak memory consumption was 58.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 87.12ms. Allocated memory is still 83.9MB. Free memory was 49.3MB in the beginning and 46.5MB in the end (delta: 2.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 62.14ms. Allocated memory is still 83.9MB. Free memory was 46.5MB in the beginning and 44.9MB in the end (delta: 1.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 586.06ms. Allocated memory is still 83.9MB. Free memory was 44.9MB in the beginning and 52.2MB in the end (delta: -7.3MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. * CodeCheck took 987.31ms. Allocated memory is still 83.9MB. Free memory was 52.2MB in the beginning and 44.8MB in the end (delta: 7.4MB). Peak memory consumption was 1.3MB. Max. memory is 16.1GB. * Witness Printer took 6.99ms. Allocated memory is still 83.9MB. Free memory was 44.8MB in the beginning and 44.3MB in the end (delta: 445.9kB). There was no memory consumed. Max. memory is 16.1GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-13 21:44:31,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca268f8f-e37d-4b5d-8b63-b56afca2a7da/bin/ukojak-verify-EEHR8qb7sm/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample